#!amber

# Copyright 2019 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# A test for a bug reduced by GraphicsFuzz.

# Short description: A fragment shader that uses a temporary struct variable

# The test passes because the fragment shader is provided with a red vec4
# as input, and copies this through to the output (via a struct)

# The following GLSL, produced by SPIRV-Cross (and then manually edited for
# readability) shows what the shader does.

# Fragment shader GLSL:
# #version 310 es
# precision mediump float;
# precision highp int;
#
# struct S
# {
#     highp vec4 v;
# };
#
# layout(binding = 0, std140) uniform somename
# {
#     highp vec4 v;
# } buf;
#
# layout(location = 0) out highp vec4 color;
#
# S undef;
#
# void main()
# {
#     S temp = undef;
#     temp.v = buf.v;
#     color = temp.v;
# }

SHADER vertex gfz_vert PASSTHROUGH

SHADER fragment gfz_frag SPIRV-ASM TARGET_ENV spv1.3
; SPIR-V
; Version: 1.3
; Generator: Khronos SPIR-V Tools Assembler; 0
; Bound: 22
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %9
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpDecorate %9 Location 0
               OpMemberDecorate %10 0 Offset 0
               OpDecorate %10 Block
               OpDecorate %12 DescriptorSet 0
               OpDecorate %12 Binding 0
               OpDecorate %21 RelaxedPrecision
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 4
          %8 = OpTypePointer Output %7
          %9 = OpVariable %8 Output
         %10 = OpTypeStruct %7
         %11 = OpTypePointer Uniform %10
         %12 = OpVariable %11 Uniform
         %13 = OpTypeInt 32 1
         %14 = OpConstant %13 0
         %15 = OpTypePointer Uniform %7
         %18 = OpTypeStruct %7
         %19 = OpUndef %18
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %16 = OpAccessChain %15 %12 %14
         %17 = OpLoad %7 %16
         %20 = OpCompositeInsert %18 %17 %19 0
         %21 = OpCompositeExtract %7 %20 0
               OpStore %9 %21
               OpReturn
               OpFunctionEnd
END

BUFFER framebuffer FORMAT B8G8R8A8_UNORM

# f
BUFFER f DATA_TYPE vec4<float> DATA
 1.0 0.0 0.0 1.0
END

PIPELINE graphics gfz_pipeline
  ATTACH gfz_vert
  ATTACH gfz_frag
  FRAMEBUFFER_SIZE 256 256
  BIND BUFFER framebuffer AS color LOCATION 0
BIND BUFFER f AS uniform DESCRIPTOR_SET 0 BINDING 0
END

CLEAR_COLOR gfz_pipeline 0 0 0 255
CLEAR gfz_pipeline
RUN gfz_pipeline DRAW_RECT POS 0 0 SIZE 256 256

EXPECT framebuffer IDX 0 0 SIZE 256 256 EQ_RGB 255 0 0